If you can boot using the DVD/CD-ROM drive, you can create your own CD-ROM to boot the installation program. This may be useful, for example, if you are performing an installation over a network or from a hard drive. Refer to Section 3.4.2, “Making an Installation Boot CD-ROM” for further instructions.
USB pen drive
If you cannot boot from the DVD/CD-ROM drive, but you can boot using a USB device, such as a USB pen drive, the following alternative boot method is available:
To boot using a USB pen drive, use the dd command to copy the diskboot.img image file from the /images/ directory on the DVD or CD-ROM #1. For example:
dd if=diskboot.img of=/dev/sda
Your BIOS must support booting from a USB device in order for this boot method to work.